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Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmo...
Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103532
ISBN  
9798280712409
DDC  
520
저자명  
Rashkovetskyi, Mykhailo.
서명/저자  
Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
발행사항  
[Sl] : Harvard University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
220 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Includes supplementary digital materials.
주기사항  
Advisor: Eisenstein, Daniel J.;Kovac, John M.
학위논문주기  
Thesis (Ph.D.)--Harvard University, 2025.
초록/해제  
요약For many years, we have known that the Universe is vast and expands with acceleration on the largest scales. However, dark energy, the substance supposedly driving this acceleration, might also weaken with time. Or at least the current standard model of cosmology has a problem explaining all the highest-quality data available. We present one of the key technical ingredients that enabled the Dark Energy Spectroscopic Instrument (DESI) Baryon Acoustic Oscillation (BAO) distance measurements - the semi-analytic covariance matrices for the two-point correlation functions of point tracers. We then briefly discuss the cosmological implications of DESI BAO results, including the suggestion of dark energy. Then, we discuss a curious possibility of relieving the Hubble tension, the discrepancy in the expansion rate of the Universe today obtained directly from a Hubble diagram versus inferred indirectly from the CMB, without introducing fundamentally new physics. In the end, we explore a novel analysis technique combining galaxy redshift surveys with the data from the thermal Sunyaev-Zeldovich effect, a secondary anisotropy in the CMB. We aim to interpretably extract more valuable cosmological information from both than standard 2-point summary statistics allow. This would enable better consistency tests for the concordance model of cosmology and potentially new, exciting discoveries.
일반주제명  
Astronomy
일반주제명  
Astrophysics
일반주제명  
Statistics
일반주제명  
Statistical physics
키워드  
Baryon acoustic oscillations
키워드  
Cosmic microwave background
키워드  
Cosmological parameters
키워드  
Galaxy clustering
키워드  
Universe
키워드  
Statistical methods
기타저자  
Harvard University Astronomy
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aRashkovetskyi,  Mykhailo.▼0(orcid)0000-0001-7144-2349
■24510▼aEnhancing  the  Analysis  of  the  Large-Scale  Structure  of  the  Universe  for  Cutting-Edge  Cosmological  Surveys  With  Two-Point  Correlation  Function  and  Beyond
■260    ▼a[Sl]▼bHarvard  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a220  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aIncludes  supplementary  digital  materials.
■500    ▼aAdvisor:  Eisenstein,  Daniel  J.;Kovac,  John  M.
■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2025.
■520    ▼aFor  many  years,  we  have  known  that  the  Universe  is  vast  and  expands  with  acceleration  on  the  largest  scales.  However,  dark  energy,  the  substance  supposedly  driving  this  acceleration,  might  also  weaken  with  time.  Or  at  least  the  current  standard  model  of  cosmology  has  a  problem  explaining  all  the  highest-quality  data  available.  We  present  one  of  the  key  technical  ingredients  that  enabled  the  Dark  Energy  Spectroscopic  Instrument  (DESI)  Baryon  Acoustic  Oscillation  (BAO)  distance  measurements  -  the  semi-analytic  covariance  matrices  for  the  two-point  correlation  functions  of  point  tracers.  We  then  briefly  discuss  the  cosmological  implications  of  DESI  BAO  results,  including  the  suggestion  of  dark  energy.  Then,  we  discuss  a  curious  possibility  of  relieving  the  Hubble  tension,  the  discrepancy  in  the  expansion  rate  of  the  Universe  today  obtained  directly  from  a  Hubble  diagram  versus  inferred  indirectly  from  the  CMB,  without  introducing  fundamentally  new  physics.  In  the  end,  we  explore  a  novel  analysis  technique  combining  galaxy  redshift  surveys  with  the  data  from  the  thermal  Sunyaev-Zeldovich  effect,  a  secondary  anisotropy  in  the  CMB.  We  aim  to  interpretably  extract  more  valuable  cosmological  information  from  both  than  standard  2-point  summary  statistics  allow.  This  would  enable  better  consistency  tests  for  the  concordance  model  of  cosmology  and  potentially  new,  exciting  discoveries.
■590    ▼aSchool  code:  0084.
■650  4▼aAstronomy
■650  4▼aAstrophysics
■650  4▼aStatistics
■650  4▼aStatistical  physics
■653    ▼aBaryon  acoustic  oscillations
■653    ▼aCosmic  microwave  background
■653    ▼aCosmological  parameters
■653    ▼aGalaxy  clustering
■653    ▼aUniverse
■653    ▼aStatistical  methods
■690    ▼a0606
■690    ▼a0596
■690    ▼a0463
■690    ▼a0217
■71020▼aHarvard  University▼bAstronomy.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0084
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357581▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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